空冷的工作原理2

Click to edit Master title style,Click to edit Master text styles,Second level,Third level,Fourth level,Fifth level,*,Edited by:Yao Tongsheng,*,空冷的工作原理,斯必克斯冷却技术(北京)有限公司200,7,年,3,月,11.11.2024,1,Edited by:Yao Tongsheng,空冷的目的,通过电能除去蒸汽的汽化热,使蒸汽冷却成水,以便锅循环使用,.,空冷的理想工作状态,:,排气温度,=,冷却水温度,即,:,空冷只除去了汽化热,而不发生任何过冷,11.11.2024,2,Edited by:Yao Tongsheng,饱和蒸汽温度曲线,基础知识,11.11.2024,3,Edited by:Yao Tongsheng,空冷装置工作原理示意图,蒸汽中空气含量低,蒸汽中空,气含量高,100%,的,空气,11.11.2024,4,Edited by:Yao Tongsheng,空冷流程示意图,CROSS SECTION,SECONDARY BUNDLE,CROSS SECTION,PRIMARY BUNDLE,FAN,FAN,顺流,逆流,STEAM,/,蒸汽,STEAM BY-PASS,蒸汽旁路,DUCT DRAIN,/,管道疏水,FAN,顺流,FAN,顺流,ATM,STEAM FLOW,/,蒸汽流向,10/93,VACUUM,PUMPS,真空泵,TURBINE EXHAUST BOX CONDENS.TANK,DEAERATOR,CONDENSATE,凝结水,TO MAIN CONDENSATE PUMPS,/,到凝结水泵,顺流剖面图,逆流剖面图,图例,:,蒸 汽,空 气,凝 结 水,压力测点,凝结水温度测点,抽空温度测点,抽空旁路阀,11.11.2024,5,Edited by:Yao Tongsheng,空冷系统流程,(300MW),到冷凝水管,自排气装置,到真空泵,11.11.2024,6,Edited by:Yao Tongsheng,空冷系统流程,(600MW),EXHAUST,STEAM,TURBINE,EVACUATION,CONDENSATE,TANK,CONDENSATE,TANK,STREET 1,M,xMAG30 AN004,P.f.c,-,Cell,4,-,M,xMAG30 AN003,M,xMAG30 AN005,P.f.c,-,Cell,5,M,xMAG30 AN002,P.f.c,-,Cell,2,M,xMAG30 AN001,P.f.c,-,Cell,1,EVACUATION,CONDENSATE,TANK,STREET 1,M,xMAG,20,AN005,-,M,M,P.f.c,Cell,4,C.f.c,Cell 1,M,xMAG,20,AN004,Cell 2,M,M,M,M,M,xMAG,20,AN006,P.f.c,Cell,5,M,xMAG,20,AN003,P.f.c,-,Cell,2,M,M,P.f.c,-,Cell,3,M,xMAG,20,AN002,M,M,xMAG,20,AN007,xMAG,20,AN008,xMAG,20,AN001,C.f.c,P.f.c,Cell 1,Exhaust steam,Section,1,=3,PfC,cells,1,CfC,cell,Section,2,=2,PfC,cells,1,CfC,cell,P.f.C Cell 6,C.f.C Cell,C.f.C Cell,11.11.2024,7,Edited by:Yao Tongsheng,常态时,蒸汽,凝结水和空气运动示意图,正常运行时，顺流,列管内自上而下凝,结水量逐渐增加，,而蒸汽量逐渐减少；,在逆流列管内，自,下而上，蒸汽量依,次减少，空气量逐,渐增加,逆 流 管 束,11.11.2024,8,Edited by:Yao Tongsheng,系统的设计理念,(1),TEB,排出蒸汽 主管路 立管 分配管 顺流,管束(80%)冷却水收集管 逆流管束(20%)冷,凝水箱,(,或,TEB),11.11.2024,9,Edited by:Yao Tongsheng,系统的设计理念,(2),蒸汽在水环真空泵真空的作用下,进入换热器,在行进过程中被冷却成水,.,为了防止过冷或者过压发生,背压的变化控制风机转速的变化,(,即,冷却效果的变化,),为了保证蒸汽充满管束,杜绝冻管风险,.,必须从系统的出口,(,逆流单元,),开始进行冷却,当出口,(,逆流单元,),无法满足需要时,下一个单元才被允许启动,11.11.2024,10,Edited by:Yao Tongsheng,系统的设计理念,(3),逆流单元风机首先启动,.,随着蒸汽流量的增加,背压升高,逆流风机转速增加,.,当无法满足需要时,顺流风机被启动,.,依次类推,.,其它列被启动,如此才能保证各个管束内充满蒸汽,且空气集聚在逆流管束顶部,避免冻管,启动顺序,:,1,2,4,3,11.11.2024,11,Edited by:Yao Tongsheng,